A security issue has been identified in Windows-based systems that could allow an attacker to cause the affected machine to stop responding to requests. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.

Supported Operating System

Windows XP

x64 Edition

Click the Download button in the upper right-hand corner of this page to start the download, or choose a different language from the drop-down list and click Go.

Do one of the following:

To start the installation immediately, click Run

To copy the download to your computer for installation at a later time, click Save.

Other critical security updates are available: To find the latest security updates for you visit Windows Update and click "Express Install." To have the latest security updates delivered directly to your computer, visit Protect your PC and follow the 3 easy steps to ensure you’re protected